Compound | Surface tension (mN/m) 0.1 wt% | Surface tension (mN/m) 0.1% surfactant (stability to hydrolysis) | |||||
H2SO4 (5%) 25˚C | After boiling (5%) H2SO4 | NaOH (1%) 25˚C | After boiling NaOH (1%) | ||||
30 min | 60 min | 30 min | 60 min | ||||
2a | 32 | 35 | 36 | 38 | 34 | 35 | 35 |
2b | 33 | 37 | 37 | 38 | 37 | 37 | 37 |
2c | 35 | 36 | 39 | 42 | 38 | 39 | 40 |
3a | 30 | 30 | 31 | 34 | 30 | 30 | 30 |
3b | 32 | 31 | 33 | 34 | 30 | 30 | 31 |
3c | 33 | 34 | 34 | 36 | 33 | 33 | 34 |
4a | 31 | 32 | 33 | 34 | 31 | 31 | 31 |
4b | 32 | 35 | 36 | 36 | 33 | 34 | 34 |
4c | 35 | 37 | 38 | 40 | 37 | 37 | 38 |
5a | 30 | 33 | 33 | 36 | 32 | 32 | 33 |
5b | 32 | 34 | 34 | 35 | 32 | 33 | 33 |
5c | 34 | 36 | 36 | 38 | 34 | 35 | 35 |
6a | 30 | 35 | 35 | 37 | 34 | 34 | 35 |
6b | 32 | 36 | 37 | 40 | 37 | 37 | 37 |
6c | 36 | 37 | 39 | 41 | 36 | 38 | 39 |
7a | 33 | 38 | 39 | 43 | 37 | 38 | 38 |
7b | 31 | 35 | 34 | 44 | 37 | 39 | 39 |
7c | 32 | 36 | 37 | 46 | 38 | 40 | 40 |
8a | 31 | 31 | 33 | 34 | 31 | 30 | 31 |
8b | 33 | 32 | 32 | 34 | 33 | 33 | 33 |
8c | 36 | 33 | 34 | 37 | 34 | 35 | 35 |
9a | 32 | 34 | 36 | 37 | 33 | 33 | 34 |
9b | 33 | 35 | 36 | 39 | 33 | 35 | 35 |
9c | 35 | 37 | 38 | 42 | 35 | 37 | 37 |